A fresh round of thunderstorms will boom across the eastern Plains and Midwest to begin the month of April. Springtime warmth will build across the nation`s midsection while colder air blasts into the northern Rockies Wednesday.Mother Nature will play an April fool`s joke on the eastern Plains and Midwest Wednesday. While the day will begin with quiet weather, a strong cold front slamming into warm 70 and 80-degree temperatures will set the stage for late-day severe storms. Destructive winds and large hail are the main threats as the storms sweep out of the eastern Plains and head for northern Missouri, Iowa and southern Minnesota.Rain will be more scattered well south and east of the front in Texas to the Mid-South. Valley and coastal showers will greet the Northwest with light snow grazing the Cascades and northern Rockies Wednesday. Meanwhile, California, the Southwest, Great Basin and large stretches of the East will be dry.Chilly 30s and 40s will sweep into the Northwest and northern Rockies. The northern Mid-Atlantic to New England will also stay cooler than average with 30s and 40s for daytime highs. An arc of 50s will extend from the Great Basin to the northern Plains and from the Great Lakes to the Ohio Valley, southern Mid-Atlantic and northern Carolinas. The Southeast will see 70s Wednesday while the recent string of 90-degree weather ends in the Southwest and southern California deserts as highs return to the 80s. Know Before(tm) and stay informed!Download WeatherBug for your mobile device and desktop computer for real-time observations, forecasts for 2.6 million cities, and the most advanced warnings to severe weather. Follow us on Twitter and Like Us on Facebook.What do you think of this story?Click here for comments or suggestions.